"Ocean work out! It's been a loooong time since I've been in the ocean," wrote the Grammy winner, 41. In the pic, Carey triumphantly beams and stretches out her toned arms and shoulders in a cleavage-bearing one-piece swimsuit, sunglasses and sun visor.

"I was so uncomfortable," added Carey. "I'm kind of proud of myself. I really am -- sorry, pregnant with twins is different than anything! [People] were always saying to me, 'Oh, but it's all worth it!' Yeah, but it's easy to say when you're not the one whose feet are this big! It turned into like a really difficult time."